Quote:
Originally Posted by slownugly
Is ur evacuation on the performance engine or the lean burn one? I often thought about doing an evacuation like I did on my gremlin drag car. From the crankcase into the exhaust downstream with an anti backfire valve. Does it make a noticeable difference the way you ran it? I've only ever see crankcase evacuations run into the exhaust
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For forced induction
As the internal combustion engine evolved it was realized that blowby gasses and particulates were corrosive and a fresh air ventilation system must be incorporated, better known as the PCV system today. My contraption may have been overkill but fulfilled the objective - force fresh air in, but the gasses were dumped overboard rather than burned. Better to suck and have negative crankcase pressure, but the pump oil logged; this was the original, double benefit concept.
There is a lot of pressure once you get past a bend or two in the exhaust (from the outlet), a venturi with may have dropped the pressure enough for crankcase gasses, but increasing the post turbine pressure, might defeat the purpose. Seems like I've already experimented with this.
Oil contamination and boost don't work well together. That block was nearing the end of its life. Carrying a bed pan around to catch the oil waste wasn't highly desirable.